JP2008075065A - 機械的物性に優れた光拡散性樹脂組成物 - Google Patents
機械的物性に優れた光拡散性樹脂組成物 Download PDFInfo
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- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 1
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- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
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- 125000003118 aryl group Chemical group 0.000 description 1
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- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 1
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- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
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- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
- C08F279/06—Vinyl aromatic monomers and methacrylates as the only monomers
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
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- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
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Abstract
【解決手段】 マトリックス樹脂として共役ジエンゴム樹脂を含む熱可塑性透明樹脂(A)100重量部、及び光拡散剤(B)0.1ないし20重量部を含むことを特徴とする。直射光や蛍光燈、又はLEDなどの光を透過させたり、拡散させる性能等の光学的性能、および光加工性及び衝撃強度などの機械的物性に優れ、製造方法の簡易な光拡散性樹脂組成物。
【選択図】なし
Description
そして、前記光拡散剤(B)は、平均粒径0.1〜100ミクロンメートルの球状であるものが望ましい。
本発明の光拡散性樹脂組成物は、マトリックス樹脂として共役ジエンゴム樹脂を含む熱可塑性透明樹脂(A)を含む。
RIcopolymer = WtA・ RIA + WtS・ RIS + WtM・ RIM
WtA = ビニルシアン化合物の重量%
RIA = ビニルシアン重合体の屈折率
WtS = 芳香族ビニル化合物の重量%
RIS = 芳香族ビニル重合体の屈折率
WtM = アクリル酸アルキルエステル、又はメタクリル酸アルキルエステル化合物の重量%
RIM = アクリル酸アルキルエステル、又はメタクリル酸アルキルエステル重合体の屈折率
なお、(メタ)アクリル酸アルキルエステル化合物は、(メタ)アクリル酸メチルエステル、(メタ)アクリル酸エチルエステル、(メタ)アクリル酸プロピルエステル、(メタ)アクリル酸2-エチルヘキシルエステル、(メタ)アクリル酸デシルエステル、及び(メタ)アクリル酸ラウリルエステルから選択される1種以上のものである。特に、(メタ)アクリル酸メチルエステルであるメチルメタクリレートが望ましい。
次に、本発明の光拡散性樹脂組成物は、ドメインとして光拡散剤を含む。
前記光拡散剤(B)として、有機、又は無機光拡散剤を単独、或は並行して用いることができる。
ブタジエンラテックス重合体15重量部(溶媒に溶けないゲル含量70%、平均粒径0.3μm)に、イオン交換水100重量部、オレイン酸ナトリウム乳化剤1.0重量部、メチルメタクリレート59重量部、スチレン23重量部、アクリロニトリル3重量部、3級ドデシルメルカプタン0.5重量部、ピロリン酸ナトリウム0.048重量部、デックストロース0.012重量部、硫化第一鉄0.001重量部及びクメンヒドロペルオキシド(cumene hydroperoxide)0.04重量部を75℃で5時間、連続的に投与し反応させた。反応後、80℃に昇温した後、1時間熟成させ反応を終了した。この際、重合転換率は、99.8%であり、固形凝固粉は0.1%であった。
(1) ブタジエンラテックス重合体15重量部(溶媒に溶けないゲル含量70%、平均粒径が0.3μm)、メチルメタクリレート48.3重量部、及びスチレン18.7重量部を用いることを除き、前記製造例1と同様の方法で熱可塑性透明樹脂を合成した。得られた熱可塑性透明樹脂の屈折率は1.516であり、重量平均分子量は120,000であった。
メチルメタアクリレート100重量部を用い、スチレン及びアクリロニトリルは用いないことを除き、製造例2(2)と同様の方法で熱可塑性透明樹脂(A-3)を製造した。得られた熱可塑性透明樹脂の重量平均分子量は140,000であり、屈折率は1.49であった。
前記製造例1ないし3の熱可塑性透明樹脂(A)と、下記表1の光拡散剤(B)を下記表2のような割合で混合し、滑剤0.1重量部及び酸化防止剤0.2重量部を投与して、220℃のシリンダ温度で二軸押出混練機を用いてペレット状に製造した。
ASTM D-1003を使って2mmのシーツ(sheet)のヘイズ値(Haze Value)を測定することで光拡散度を測定した。
2. 光透過率(Total Transmittance, %)
ASTM D-1003を使って2mmのシーツの全光線透過率を測定した。
3. 衝撃強度(Notched Izod Impact Strength, kg・cm/cm)
ASTM D-256を使って1/8"試験片のNotched Izod衝撃強度を測定した。
4. 流動性(Melt Index)
ASTM D-1238を使って220℃及び10kgの条件で押出されたペレットの流動性を測定した。
Claims (13)
- 共役ジエン(conjugated diene)ゴム樹脂を含む熱可塑性透明樹脂(A)100重量部、及び光拡散剤(B)0.1ないし20重量部を含むことを特徴とする光拡散性樹脂組成物。
- 前記熱可塑性透明樹脂(A)は、共役ジエンゴム樹脂5ないし30重量部に、メタクリル酸アルキルエステル化合物、又はアクリル酸アルキルエステル化合物20ないし70重量部、及び芳香族ビニル化合物8ないし50重量部の単量体混合物がグラフト重合されたことを特徴とする請求項1に記載の光拡散性樹脂組成物。
- 前記単量体混合物に、ビニルシアン化合物(vinylcyan compound)1ないし20重量部がさらに含まれることを特徴とする請求項2に記載の光拡散性樹脂組成物。
- 前記熱可塑性透明樹脂(A)は、共役ジエンゴム樹脂に、メタクリル酸アルキルエステル化合物又はアクリル酸アルキルエステル化合物と、芳香族ビニル化合物の共重合体がグラフト重合されたことを特徴とする請求項1に記載の光拡散性樹脂組成物。
- 前記熱可塑性透明樹脂(A)は、共役ジエンゴムの樹脂に、メタクリル酸アルキルエステル化合物又はアクリル酸アルキルエステル化合物、芳香族ビニル化合物及びビニルシアン化合物の共重合体がグラフト重合されたことを特徴とする請求項1に記載の光拡散性樹脂組成物。
- 前記共役ジエンゴム樹脂と、メタクリル酸アルキルエステル化合物又はアクリル酸アルキルエステル化合物と芳香族ビニル化合物の共重合体間の屈折率差が0.005以下であることを特徴とする請求項4に記載の光拡散性樹脂組成物。
- 前記共役ジエンゴム樹脂とメタクリル酸アルキルエステル化合物又はアクリル酸アルキルエステル化合物、芳香族ビニル化合物及びビニルシアン化合物の共重合体間の屈折率差が0.005以下であることを特徴とする請求項5に記載の光拡散性樹脂組成物。
- 前記共役ジエンゴム樹脂は、平均粒径が600Åないし5000Åであることを特徴とする請求項1に記載の光拡散性樹脂組成物。
- 前記光拡散剤(B)は、平均粒径0.1ないし100ミクロンメートルの球状であることを特徴とする請求項1に記載の光拡散性樹脂組成物。
- 前記光拡散剤(B)は、アクリル系樹脂、シロキ酸系樹脂、ポリカーボネート系樹脂、スチレン系樹脂、炭酸カルシウム、硫酸バリウム、二酸化チタン、水酸化アルミニウム、シリカ、ガラス、滑石、雲母(マイカ)、ホワイトカーボン、酸化マグネシウム、及び酸化亜鉛からなるグループより選択される1種以上であることを特徴とする請求項1記載の光拡散性樹脂組成物。
- 前記熱可塑性透明樹脂(A)と、前記光拡散剤(B)の屈折率差が0.005以上であることを特徴とする請求項1に記載の光拡散樹脂組成物。
- 前記熱可塑性透明樹脂(A)は、メタクリル酸アルキルエステル化合物、又はアクリル酸アルキルエステル化合物20ないし70重量部、及び芳香族ビニル化合物8ないし50重量部を共重合させる第1段階と、
前記共重合体を、共役ジエンゴム5ないし30重量部とグラフト重合させる第2段階とから製造されることを特徴とする請求項4に記載の光拡散樹脂組成物。 - 前記第1段階は、ビニルシアン化合物1ないし20重量部をさらに含んで共重合させることを特徴とする請求項12に記載の光拡散樹脂組成物。
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